Apparatus for treating milk or cream.



T. L. VALERIUS.

APPARATUS FOR TREATING MILK 0R CREAM.

AFPLlCATUN FILED APR. 14, 19H.

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T. L. VALERIUS. APPARATUS FOR TREATING MILK 0R CREAM.

Patented Jan. 2, 1917.

3 SHEETS-SHEET-Z.

Zeven/aff T. L. VALERIUS.

APPARATUS FOR TREAUNG MILK 0R CREAM.

APPLICATION HLED APR.14, 1911.

Patented Jan. 2, 191?.

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UNITE@ STATES THEODORE L. VALERIUS, OF FORT ATKINSON, WISCONSIN, ASSIGNOR T0 CREAMERY -PACKAGE@ MANUFACTURING COMPANY, QF CHICAGO, ILLINOIS, A CORPORATION 0F ILLINOI.

APPARATUS FOR TEEATIN G /MILK QR CREAM.

Patented aan. a, ier?.

Application led April 14, 1911. Serial No. 620,987. I

and State of Wisconsin, have invented certain new and useful Improvements in Apparatus for Treating Milk or Cream, of

which the following is a specification.

One of the objects of this invention is to provide an improved machine for heating batches of milk or cream to a pasteurizing temperature and holding the milk at such temperature a suflicient length of time to destroy all bacteria therein. The temperature at which I prefer to hold the milk is about 140 Fahr., the milk being held at this point for approximately twenty minutes. It has been found that this temperature maintained for the time specified is Sufficient to destroy all bacteria, and that this treatment of the milk will not coagulate the albumin therein or destroy the cream line, or tendency of the butter fat to rise in the milk, the

latter having every quality of fresh cows milk as regards taste and at the same time being much more healthful on account of the elimination of the harmful bacteria, and also having the quality of keeping for a greater length of time without souring.

Another' object of my invention is to' produce a machine which may be operated-by itself to heat, hold and cool the milk, thus entirely dispensing with a separate cooler, the milk being delivered directly from the machine to a bottle filler and capper; or, which may, if desired, be operated in connection with one or more similar machines so that al continuous cooler of any of the standard types now upon the market may be continuously supplied from one of the pasteurizers of the series without interruption, or intermittently at intervals of the desired length.

The machine may further be used, in the case of an accident to a cooler, as a storage tank for the milk, the milk being held in the machine and maintained at a low temperature for storage.

A further object of the`invention is to produce a pasteurizing machine equipped the milk solids. This object I accomplishv by causing a circulation of heated fluid through and about the tank, the fluid being heated by steam injected thereinto' and before it comes in contact with the wall ofthe milk tank. In this way live steam is prevented at all times from coming into direct 4contact with the milk receptacle.

My invention further relates to a machine of the character described which may be very easily cleaned and which may be thoroughly sterilized by steam admitted toY the heating passages, so that the entire interior of the tank may be raised to and maintained at a temperature sufficient to thoroughly sterilize the tank previous to placing the milk therein.

Referring to theaccompanying drawings, in which I have illustrated the preferred form of my invention, Figure 1 is a Side elevation with parts broken out, showing a machine embodying the features of my invention. Fig. 2 is an elevation of the for- Ward orhead end of the machine. 'Fig 3 is a diagrammatic view showing the combination of three machines in such relation that the apparatus may supply milk to a continuous cooler without interruption.

In the form herein illustrated, the machine comprises a vat of suitable form and dimensions, said vat comprising side Weils l, end Walls 2, and a trough-like bottom 3, and being supported upon suitable legs 4:. The top of thevat is open and the upper edge is preferably constructed to receive a cover such as is illustrated in my prior Patent No. 790,466, issued May 28, 1905, so as to provide a water-seal between the vat and its cover. I have deemed it unnecessary to show this construction herein. i

The vat is preferably made of heavy wood and has a suitable insulating lining inv its interior, within which lining fits the milk tank 5. The bottom wall of this tank is spaced some distance above the bottom 3 of the vat to provide a jacket or space 6 for circulation of the tempering fluid.

Rotatably mounted in suitable bearings 7 in the end walls 2 of the vat is a tempering spiral 8 which may be of any suitable construction such asthose shown in my Patents Nos. 790,466 and 933,934. The outer ends of the hollow shaft of tlzis tempering member extend into stuing boxes 9 carried by brackets 1() mounted upon the end walls 2 of the vat, said stuliing boxes preventing leakage between said spiral and the tempering fluid pipes to be presently described.

The tempering spiral 8 may be rotated by suitable means such as a shaft 11 mounted in bearings 12 upon the bracket 10 and in a bearing bracket 13, said shaft having a drive pulley 14 thereon and being' connected with' l 19 and 2 0 are controlling valves in 'the steam pipe 16 and water pipe: 17, respeclto heat said water and assist to force the tively. A steam; jet or injector 21 in the steam supply pipe 16' is arranged to discharge steam into-'the Water inthe pipe 17 water through the rotary tempering member, the rotation of said tempering member, due to its spiral formation having a suction or pumping action upon the water to further assist in drawing the same through said tempering member. Flowing from the right-hand end (Fig. 1) of the member `8, the water is conducted through a'pipe 22 to the adjacent vend of the water jacket 6. Steam from asupply pipe 23 is'injected through a mufer or injector 24 into the pipe 22 for the purpose of further heatin th'e water therein and increasing the spee of circulation. v

The Water flowing from the jacket- 6 at the head end of the machine is conducted to the pipe 17 through a pipe 25 having a check valve 2y the'reinto prevent rearward flow of water through said pipe. f

27 .is a. pipe-communicating with the water v jacket 6- and having an overow pipe 28 ,connected to the sewer system or other def sired' outlet.

29 is. a vent ipe communieatingI with the pipe 27. Pipes 30 and 31 ".'provide'means for draining the milk tank 5v and the Water jacket respectively, saidv able means.

In the operation of the machine when= used as a. pasteurizer,` milk or cream hav-f Ving been introduced into the vat, the water-apparatus, taken-asa whole',jmay be 'changed i to suit lthe'requirements 'ofjthe particular pipes. being normally closed by 'any suitsupply valve 20 is opened to admit' water to fill the passages'of the machine, when said Water valve' mav be closed. Steamis nonT admitted throughboth the"y pipes '16' and 23 to heat the water and cause a circulation thereof through the rotary spiral 8, pipe 22, Water jacket 6, and pipe 25, so that the milk in the gat will be quickly brought 'to apasteuriz'ing tempera ure. It will be noted that in addition to t e heating action of the tempering coil 8, the Water jacket 6 provides a very large heating space, since the bottom of the milk tank 5 1s seated in the Water of said jacket.

' In Fig. 3 I have shown\an effective combination of a vat into which milk maybe poured from cans or'the like, and three pasteurizing machines (which may be of' the v -type hereinbefore described), whereby milk may be continuously supplied from themachines, considered as a whole, to a continuous cooler, the latter delivering the milk without interruption toone or more fillers and cappers. Milk from the dump vat A" may be forced' byV a pump B through a main pipe C andl branch pipes D to `the bank of` pasteurizing machines E. lThe y milk flows from the machines E through branch/pipes F and a main pipe (Jr to a continuous cooler H, of any suitable type. From the cooler H the milk is conveyed through pipes I to one or more combined'flling and capping machines J. Preferably the' pasteurizers E are located at a higher ilevel than the cboler H so that the milk will flow by the cooler H is positioned at a higher level than the filling and capping machines J for the same purpose. l( indicates a stairway leading from. the level ofthe filling and 4indicated bv the letter O.'

.As will be understood the discharge'from each of the individual machines E is intermittent. By'combining two or .more of the machines E in the above manner, the machines may be maintained in .successive stages of operation, by means of suitable vvalves, such asthe valves P, Fig. 3, that is vto say, one of the machines may be filled,

while the contents of a second is being heated and held, and' a'third is being discharged into the continuous cooler, so that the discharge of milk -from thebank of machines E to the cooler may be continuous`- and milk constantly delivered to the bottle .lling machines. vIt will be understood that by infcreasing, or decreasingthe number of pas- 'teurizers in the series, thecapacity of the creamegg'also the discharge l'from the machines need not be continuous but may be separatedby intervals of the desired length,

this lbeing controlled by suitable valves Pas y 'conditions may dictate.

If it be desiredto heat, hold and cool the milk all in the same "machine, steam and Water will be supplied-at first as above exravityv from the former to the latter, and likewise plain'ed, and then the steam will be entirelyu shut oil and cold water or other suitable ,--1`3o cooling medium admitted to the machine to lower the temperature of the milk to the desired oint.

It vv' l be seen that the steam from the supply pipes 16 'and 23 never comes in contact with the milk vtank 5, the steam first being injected into the Water and thus forcing the heating water into the spiral 8, and finally into the Watcr jacket 6. In this-Way 'anykllability of scorching' or burning of the m1 is absolutely obviated.

When itis desired to sterilize the machine before placingmilk therein, steam may be admitted from the pi es 16 and 23 to the machine to bring the Wa s' of the milk tank and the entire interior of the' vat to a te1nperature suicient to thoroughly sterilize the vat.

While the .embodiment of my invention Whichp have herein shown and described is the preferred form thereof, I recognize that varions modications Within the scope of my invention may be made, Wherefore'I do .not limit myself to the details herein -set forth.

l claim as my invention:

l. In a machine of the class described, the combination of a horizontally arranged vat containing. a milk chamber and a Water jacket for the bottom of said chamber, a

v hollow spiral tempering member mounted within said milk chamber for rotation on a horizontal axis, pipes connecting the lopposite ends of said spiral member with the adjacent ends of said water jacket, al steam supply pi e and a Water pipe communicating with the st mentioned pipes at one end of the machine, said steam pipe being adapted to inject a jet of steam into the other pipes to heat the Water and cause a circulation thereof from end to end through the spiral site direction and through the pipes at member in one direction and through, pipes at one end of the machine, then end to end of said water jacket in tl opposite end of the machine.

2. ln combination, a bank oi batch teurizers each comprising a vat having there in a rotary spiral tempering member, means for supplying heating iuid to said temper4 ing member, a supply pipe having branches arranged to convey milk to all of 'said teurizers, a continuous cooler, a pipe discharging into said cooler and having branches connected Awith the discharge from the respective pasteurizers, mn whereby said pasteufrizers may be marntained in diierent successive stages of er ation With relation to each other th pnrpose described. s@

3. in combination, a bank oi batch me teu'rizerseach comprising a. vat the; in a rotary spiral tempering member, :nea forsupplying heating fluid to said temps ing member, a supply ipe having branches f, arranged to convey milk tc all or' said pasw teurizers, a continuous cooler, a pipe dis- 'charging into said cooler and having inlet Copies of this patent may he' obtained for ve centsv achjby addressing the "tommiseioncr ai Weshington, n., e. 

